Not until version 5.1.8 comes out, then it will be simple to do. For the moment there is no way to perform an action on a list made using the list widget. If you do want to use the prerelease (or 5.1.8 when it comes out) the code would be:
<$button>Button Label <$list filter='[tag[SomeTag]]'> <$fieldmangler> <$action-sendmessage $message='tm-add-tag' $param=<<now>>/> </$fieldmangler> </$list> </$button> -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/tiddlywiki. For more options, visit https://groups.google.com/d/optout.

